XML 130 R117.htm IDEA: XBRL DOCUMENT v3.8.0.1
Statutory Financial Information, Capital Requirements, and Restrictions on Dividends and Transfers of Funds (Dividends) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Total stockholders’ equity $ 1,712,957,000 $ 1,531,370,000 $ 1,398,041,000
Ordinary dividends paid 80,100,000    
Maximum ordinary dividends $ 211,000,000    
Maximum borrowing percentage 10.00%    
New Jersey Dividend Restriction 10.00%    
New York Dividend Restriction 10.00%    
Dividend Restriction New York 100.00%    
Selective Insurace Company of America (SICA) [Member]      
Ordinary dividends paid $ 28,000,000    
Maximum ordinary dividends 77,600,000    
Selective Way Insurance Company (SWIC) [Member]      
Ordinary dividends paid 19,000,000    
Maximum ordinary dividends 43,300,000    
Selective Insurance Company of South Carolina (SICSC) [Member]      
Ordinary dividends paid 10,000,000    
Maximum ordinary dividends 17,900,000    
Selective Insurance Company of the Southeast (SICSE) [Member]      
Ordinary dividends paid 7,500,000    
Maximum ordinary dividends 14,700,000    
Selective Insurance Company of New York (SICNY) [Member]      
Ordinary dividends paid 4,500,000    
Maximum ordinary dividends 10,700,000    
Selective Insurance Company of New England (SICNE) [Member]      
Ordinary dividends paid 2,000,000    
Maximum ordinary dividends 6,200,000    
Selective Auto Insurance Company of New Jersey (SAICNJ) [Member]      
Ordinary dividends paid 2,500,000    
Maximum ordinary dividends 11,300,000    
Mesa Underwriting Specialty Insurance Company (MUSIC) [Member]      
Ordinary Dividends Paid To Parent 2,100,000    
Maximum ordinary dividends 10,300,000    
Selective Casualty Insurance Company (SCIC) [Member]      
Ordinary dividends paid 3,000,000    
Maximum ordinary dividends 13,400,000    
Selective Fire and Casualty Insurance Company (SFCIC) [Member]      
Ordinary dividends paid 1,500,000    
Maximum ordinary dividends 5,600,000    
Parent Company [Member]      
Total stockholders’ equity 1,700,000,000    
Maximum ordinary dividends 114,500,000    
Additional Borrowing Capacity for Parent $ 70,500,000